code: def pytest_addoption(parser):
      parser.addoption(
          "--fast",
          action="store_const",
          default=False,
          const=True,
          help="Run e2e tests fast",
      )
  
file_path: m2cgen/tests/conftest.py
imports: import io
  import pickle
  import pytest
  from sklearn.linear_model import LinearRegression
  from tests.utils import get_regression_model_trainer, tmp_dir
label_desc: Use image node_id 1 for calling a global function with example usage: pytest_addoption(parser) without return types